青海农田草害调查研究工作,历时5年,现已基本结束,进行成果鉴定,兹将工作总结如下: 一青海农田杂草危害严重,是影响农业生产的重要限制因素。二十多年来,我们首先针对危害最严重的恶性杂草野燕麦,继后有密花香薷、薄蒴草等单一草种的发生规律和 Qinghai farmland grass damage investigation and research work lasted 5 years, has now been basically completed, the results of identification, the work will be summarized as follows: a Qinghai farmland weeds harms serious impact on agricultural production is an important limiting factor. For more than two decades, we first directed against the most harmful wild weed wild oats, followed by the dense lawn, thin bolt grass and other single grass law of occurrence and